Heart Structure(Science)

Circulation

CirculationHeart structure

Function:

To transport materials

around the body

Oxygen

Carbon dioxide

Digested food

Hormones

Waste chemicals - urea

Heat

3 Major Parts of the Circulatory system

Blood Vessels - routes blood travels

Heart – pumps or pushes blood through body

Blood – carries important “ *stuff ” through body

* Stuff – includes oxygen, food, & waste

1 Blood Vessels : One Way Streets

• Blood Vessels resemble very long and skinny tunnels that are all through your body.

• #2 The Heart

4 chambers ( or compartments )

2 upper chambers : Left Atrium

Right Atrium

2 lower chambers : Left Ventricle

Right Ventricle

Lub If you listen

to your heartbeat, it makes a lub dub sound.The lub is when blood is pushed out of the heart into the body and the dub is the reloading of the heart with more blood ready to push it out to the body

Dub

Blood Flow through the Human Body

Blood with little oxygen is pumped from the Right Atrium through a valve to the Right Ventricle and through another valve into the Pulmonary Vein. The Pulmonary Vein sends it to the Lungs to pick up Oxygen. It’s sent from the Lungs through Pulmonary Arteries to the Left Atrium through a valve to the Left Ventricle. The Left Ventricle sends it through a valve to the Aorta. The Aorta is a series of branches that sends oxygenated blood throughout the body.

Systemic – to the organs of the body

Pulmonary system – up to the lungs

OXYGENCARBON DIOXIDE

Left side

Oxygenated blood from the lungs enters the heart and is pumped to the body organs and tissues

Right side

Deoxygenated blood from the body is returned to the heart to be pumped to the lungs

EVALUATIONFILL IN THE BLANKS1)In mammals, the ………Is divided into four parts.heart2)The heart …………………………. Continuously .pumps3)The vessels carrying blood from the heart to the different parts of the body are called ……………Blood vessels4)The vessels carrying blood from the parts of the body to the heart are called ………………veins

FILL IN THE RIGHT WORDS USING THE CLUES.

1)BLOOD ― ― ― ― ― ― ―Route bloods travelsvessels2) ― ― ― and ― ― ― Voice maid by heartLub and dub3) ― ― ― ― ―Pumps or pushes blood through

body heart